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Electrophotographic developing method using magnetic developing material and apparatus employed therefor

US 5,488,465 A · Assignee: Matsushita Electric Industrial Co., Ltd. · Inventors: Yamamoto; Hajime et al.

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed July 27, 1992 and granted January 30, 1996. A patent filed before June 8, 1995 lasts 17 years from grant or 20 from filing, whichever is longer, so its term ended January 30, 2013.
  • Any extension is capped at five years, so it can't still be in force.
  • We haven't checked its US family, and a later related patent could still be in force. We check US rights only.
FiledJuly 27, 1992
GrantedJanuary 30, 1996
Term endedJanuary 30, 2013
Application number07/919905
Classification (CPC)G03G15/095 +2 more
Length25 pages

Timeline

Timeline From USPTO dates

1993199619992002200520082011Application filedJuly 27, 1992Patent grantedJan 30, 1996Term endedJan 30, 2013

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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